Welcome to the tutorial category. Right now there is just one which i wrote regarding a thread on 3dbuzz.com but i hope i soon will find time to write some more.
Please note that these are beginners tutorials, so don't expect to find neat professional tricks, there's just the basics here... ;-)
Selections, Particles and Turbulence: A burning castle
In this tutorial we are going to burn the hell out of an innocent castle using selections and particles in Discreet Combustion